450 cfm holley economaster quadrajet carb fuel economy

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Subject: 450 cfm holley economaster quadrajet carb fuel economy


STAHLE PERFORMANCE, INC CARBURETORS
* All Metal Power Valve - No Rubber Components to Blow out or Fail
* Factory Chevy OEM Divorced Choke Linkage - will work on any year Small block or Big block GM application if using an Edelbrock Perfomer aftermarket aluminum intake manifold. Will also work on stock GM quadrajet equipped cast iron manifolds from 1965-1974. See below info on choke setup.
* Thick Base Gasket and Air Cleaner Gasket Included
* Power Brake Boost Vacuum Port
* Distributor Vacuum Advanced Port (Timed Vacuum)
* Multiple Full Vacuum Accessory Ports
* Bolts Directly onto Manifolds Equipped with Quadrajet or Thermoquad Carbs
Spreadbore carburetor mounting dimensions, distance from center to center of bolt holes in baseplate are as follows: left to right 4 1/4”, front to back 5 5/8”.
Choke Setup - this carburetor uses a very simple and effective factory oem "divorced" also referred to as "remote" choke. The bi-metallic heat activated choke works by using engine heat off the manifold to activate the bi-metallic spring, which flips the choke lever open. It is easier to install than an electric choke (doesn't require a pos. wire), plus will never burn out and cause problems like the electric chokes do after several years of use. This is the same proven choke system that GM used for many years on its factory 4bbl quadrajets. The choke will work on any year small block or big block GM product if upgraded to the Edelbrock Performer aluminum intake manifold. It will also work on all stock cast iron GM quadrajet equipped manifolds from 1965 to 1974. The last photo shows this carburetor on an edelbrock performer intake on a 1985 small block chevy 350.
To use on 1975 or later small block Chevy upgrade intake to Edelbrock Perfomer part number EDL-2101 aluminum intake and bi-metallic spring kit part EDL-1931.
To use on 1975 or later Big Block Chevy upgrade intake to Edelbrock perfomer EDL-2161 aluminum intake and bi-metallic spring kit part number EDL-1935
Spreadbore carburetor mounting dimensions, distance from center to center of bolt holes in baseplate are as follows: left to right 4 1/4”, front to back 5 5/8”. (This mounting bolt pattern is the same as a Quadrajet, Edelbrock, or Carter carburetor)
THE STAHLE PERFORMANCE INC DIFFERENCE: QUALITY: There is a major difference in the quality of a carburetor rebuild by those who simply install a gasket kit and those who RECONDITION a carburetor. We go beyond rebuilding by reconditioning parts to or above original holley factory specs. We have in-house machine shop capabilities and have designed our own tooling specifically for Holley Carbs.
REBUILD PROCESS: We disassemble and soak every carburetor in NAPA MAC professional carb cleaner. This removes all varnishes and deposits that may have accumulated in the carburetor passages and ports. All main bodies and metering blocks are blown clean with 150 psi compressed air. All carburetors are througly inspected for defects or worn/broken parts. Our carbs are GUARANTEED not to have mechanical defects such as stripped threads, cracked baseplates, worn throttle shafts, etc. All carburetors are hand assembled. We install jets, pump nozzles, power valves, and metering plates sizes as specified in the Holley Carburetor Factory Specifications Book. All carburetor floats are leak tested prior to install. Our throttle shafts are hand checked for play to ensure we meet acceptable tolerance limits. We will machine throttle shaft bores to fit bushings and ream brass bushings to original size only as required for out-of tolerance units, restoring the carb to original performance specifications. Looking for a particular carb or not sure which carb is right for your application? ASK. We will be glad to assist you in the selection of the right carburetor for your application.

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